Results 71 to 80 of about 310,031 (299)

Graviton fluctuations erase the cosmological constant

Physics Letters B, 2017
Graviton fluctuations induce strong non-perturbative infrared renormalization effects for the cosmological constant. The functional renormalization flow drives a positive cosmological constant towards zero, solving the cosmological constant problem ...
C. Wetterich
doaj   +1 more source

Kosmologi Ibnu Arabi dan Covid-19: Relasi dan Solusi Alternatif dalam Tasawuf Filosofi

Esoterik: Jurnal Akhlak dan Tasawuf, 2021
This paper aims to discuss Ibn Arabi's cosmological thinking in relation to the Covid-19 phenomenon. According to Ibn Arabi, the cosmological phenomenon is a reality that does not appear by itself but comes from God.
Muhammad Firdaus Imaduddin, Suhartono Suhartono, Roibin Roibin   +2 more
doaj   +1 more source

Cosmological neutrinos

, 2004
The current status of neutrino cosmology is reviewed, from the question of neutrino decoupling and the presence of sterile neutrinos to the effects of neutrinos on the cosmic microwave background and large scale structure.
Abbasi R U, Aliani P Antonelli V Picariello M Torrente-Lujan E, Allen S W Schmidt R W Bridle S L, Avila-Reese V Colin P Valenzuela O D'Onghia E Firmani C, Barger V Marfatia D Tregre A, Bilenky S M, Crotty P Lesgourgues J Pastor S, Cuoco A Iocco F Mangano G Miele G Pisanti O Serpico P D, Davidson S Ibarra A, de Holanda P C Smirnov A Y, Dicus D A, Dodelson S, Dolgov A D, Elgaroy O, Fields B D, Fogli G L, Fuller G M, Gelmini G Varieschi G, Gershtein S S, Giudice G F, Greisen K, Haiman Z Barkana R Ostriker J P, Hamaguchi K Murayama H Yanagida T, Hambye T, Hannestad S, Hannestad S, Hannestad S, Hannestad S, Hannestad S, Hannestad S Raffelt G, Hayashida N, He H J Dicus D A Ng J N, Hogan C J, Ichikawa K, Kazantzidis S Mayer L Mastropietro C Diemand J Stadel J Moore B, Klapdor-Kleingrothaus H V, Knop R A, Kohri K, Kolb E W, Kraus C, Lesgourgues J Pastor S Perotto L, Ma E, Madsen J, Mangano G Miele G Pastor S Peloso M, Minakata H, Narayanan V K Spergel D N Dave R Ma C P, Pastor S Raffelt G G Semikoz D V, Rana N C, Ringwald A, Salucci P, Sigl G, Sommer-Larsen J Dolgov A, Steen Hannestad, Steigman G, Tegmark M, Tegmark M, Vissani F, Wang X Tegmark M Jain B Zaldarriaga M, Zatsepin G T   +58 more
core   +1 more source

Phantom cosmologies

Physical Review D, 2004
12 pages, revtex, 3 figures, 1 table, references ...
openaire   +2 more sources

COSMOLOGICAL BACKREACTION [PDF]

The Twelfth Marcel Grossmann Meeting, 2012
15 pages, 3 figures; presented at the 12th Marcel Grossmann Meeting, Paris, July ...
openaire   +3 more sources

Feasibility Study for Application of Digitized Henize Mt. Wilson Michigan Southern Sky Hα$$ \boldsymbol{\alpha} $$ Survey Low‐Dispersive Spectral Plates for Searches for Anomalous and Highly Redshifted Objects

Astronomische Nachrichten, EarlyView.
ABSTRACT The goal of this study is to confirm the feasibility of the use of digitized low dispersive MtWilson Michigan Southern Sky Hα$$ \alpha $$ survey astronomical photographic plates for modern astrophysical research. The detection of highly redshifted objects, such as early galaxies and quasars, is fundamental to understanding the universe's ...
Tauseef Ahmad Zafar, René Hudec, Marta Mara Merono Vidagany, Fehmi Mejri   +3 more
wiley   +1 more source

Gravitational production of completely dark photons with nonminimal couplings to gravity

Journal of High Energy Physics
Dark photons are a theorized massive spin-1 particle which can be produced via various mechanisms, including cosmological gravitational particle production (GPP) in the early universe.
Christian Capanelli, Leah Jenks, Edward W. Kolb, Evan McDonough   +3 more
doaj   +1 more source

Primordial black holes in Gauss-Bonnet gravity

Physics Letters B
In this paper, we investigate the production of primordial black holes (PBHs) during the preheating era. Indeed, the amplification of field fluctuations can lead to the amplification of curvature perturbations.
Brahim Asfour, Aatifa Bargach, Yahya Ladghami, Ahmed Errahmani, Taoufik Ouali   +4 more
doaj   +1 more source

Cosmological solutions, p-branes and the Wheeler-DeWitt equation [PDF]

, 1997
The low energy effective actions which arise from string theory or M-theory are considered in the cosmological context, where the graviton, dilaton and antisymmetric tensor field strengths depend only on time.
A. A. Kehagias, A. A. Tseytlin, A. Anderson, A. Lukas, A. Lyons, B. Campbell, C. N. Pope, E. Copeland, E. J. Copeland, F. Larsen, G. W. Gibbons, H. Lü, H. Lü, H. Lü, H. Lü, H. Lü, J. Barrow, J. Maharana, J. Maharana, K. Behrndt, M. Gasperini, M. Gasperini, N. Kaloper, R. Brandenberger, R. Brustein, R. Poppe, S. Mukherji, S. Mukherji   +27 more
core   +2 more sources

State‐Level Politics in Forest Governance: The Role of the Narrative‐Policy Nexus in the Brazilian Amazon

Environmental Policy and Governance, EarlyView.
ABSTRACT Deforestation and its social impacts are an enduring challenge in agrarian frontiers, especially in the tropics. Fueled by global demand for commodities, this process is mediated by ideas, concepts, meanings, and policies that uphold socioenvironmental degradation. A key and understudied—arena in which this mediation occurs is the sub‐national
Gabriela Russo Lopes, Fabio de Castro
wiley   +1 more source